using System;
using System.Collections.Generic;
using System.Text.RegularExpressions;
using System.Windows.Controls;
using Flow.Launcher.Plugin.SharedCommands;

namespace Flow.Launcher.Plugin.Url
{
    public class Main : IPlugin, IPluginI18n, ISettingProvider
    {
        //based on https://gist.github.com/dperini/729294
        private const string UrlPattern = "^" +
            // protocol identifier
            "(?:(?:https?|ftp)://|)" +
            // user:pass authentication
            "(?:\\S+(?::\\S*)?@)?" +
            "(?:" +
            // IP address exclusion
            // private & local networks
            "(?!(?:10|127)(?:\\.\\d{1,3}){3})" +
            "(?!(?:169\\.254|192\\.168)(?:\\.\\d{1,3}){2})" +
            "(?!172\\.(?:1[6-9]|2\\d|3[0-1])(?:\\.\\d{1,3}){2})" +
            // IP address dotted notation octets
            // excludes loopback network 0.0.0.0
            // excludes reserved space >= 224.0.0.0
            // excludes network & broacast addresses
            // (first & last IP address of each class)
            "(?:[1-9]\\d?|1\\d\\d|2[01]\\d|22[0-3])" +
            "(?:\\.(?:1?\\d{1,2}|2[0-4]\\d|25[0-5])){2}" +
            "(?:\\.(?:[1-9]\\d?|1\\d\\d|2[0-4]\\d|25[0-4]))" +
            "|" +
            // host name
            "(?:(?:[a-z\\u00a1-\\uffff0-9]-*)*[a-z\\u00a1-\\uffff0-9]+)" +
            // domain name
            "(?:\\.(?:[a-z\\u00a1-\\uffff0-9]-*)*[a-z\\u00a1-\\uffff0-9]+)*" +
            // TLD identifier
            "(?:\\.(?:[a-z\\u00a1-\\uffff]{2,}))" +
            ")" +
            // port number
            "(?::\\d{2,5})?" +
            // resource path
            "(?:/\\S*)?" +
            "$";
        private readonly Regex UrlRegex = new(UrlPattern, RegexOptions.Compiled | RegexOptions.IgnoreCase);
        internal static PluginInitContext Context { get; private set; }
        internal static Settings Settings { get; private set; }

        public List<Result> Query(Query query)
        {
            var raw = query.Search;
            if (IsURL(raw))
            {
                return
                [
                    new()
                    {
                        Title = raw,
                        SubTitle = Localize.flowlauncher_plugin_url_open_url(raw),
                        IcoPath = "Images/url.png",
                        Score = 8,
                        Action = _ =>
                        {
                            if (!raw.StartsWith("http://", StringComparison.OrdinalIgnoreCase) && !raw.StartsWith("https://", StringComparison.OrdinalIgnoreCase))
                            {
                                raw = GetHttpPreference() + "://" + raw;
                            }
                            try
                            {
                                if (Settings.UseCustomBrowser)
                                {
                                    if (Settings.OpenInNewBrowserWindow)
                                    {
                                        SearchWeb.OpenInBrowserWindow(raw, Settings.BrowserPath, Settings.OpenInPrivateMode, Settings.PrivateModeArgument);
                                    }
                                    else
                                    {
                                        SearchWeb.OpenInBrowserTab(raw, Settings.BrowserPath, Settings.OpenInPrivateMode, Settings.PrivateModeArgument);
                                    }
                                }
                                else
                                {
                                    Context.API.OpenWebUrl(raw);
                                }

                                return true;
                            }
                            catch(Exception)
                            {
                                Context.API.ShowMsgError(Localize.flowlauncher_plugin_url_cannot_open_url(raw));
                                return false;
                            }
                        }
                    }
                ];
            }

            return [];
        }

        private static string GetHttpPreference()
        {
            return Settings.AlwaysOpenWithHttps ? "https" : "http";
        }

        public bool IsURL(string raw)
        {
            raw = raw.ToLower();

            if (UrlRegex.Match(raw).Value == raw) return true;

            if (raw == "localhost" || raw.StartsWith("localhost:") ||
                raw == "http://localhost" || raw.StartsWith("http://localhost:") ||
                raw == "https://localhost" || raw.StartsWith("https://localhost:")
                )
            {
                return true;
            }

            return false;
        }

        public void Init(PluginInitContext context)
        {
            Context = context;

            Settings = context.API.LoadSettingJsonStorage<Settings>();
        }

        public string GetTranslatedPluginTitle()
        {
            return Localize.flowlauncher_plugin_url_plugin_name();
        }

        public string GetTranslatedPluginDescription()
        {
            return Localize.flowlauncher_plugin_url_plugin_description();
        }

        public Control CreateSettingPanel()
        {
            return new SettingsControl();
        }
    }
}
